In 1987, research started on an offshore floating wave power device called "Mighty Whale" at the Japan Marine Science and Technology Center (JAMSTEC). The "Mighty Whale" converted wave energy into electrical energy. It was equipped with a wave height dissipation function to produce a relatively calm sea at the site. The prototype for open sea tests was built and moored on the test site at the end of July 1998. The maximum total declared generated power is 110 kW. This open sea test ended on March 2002. The "Mighty Whale" floating body was removed from this test site in 2002.